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Corydoras aeneus
Bronze Cory Cat

 Age of Aquariums > Freshwater Fish > Bronze Cory Cat - Corydoras aeneus

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Corydoras_aeneus_3.jpg (19kb)
Photo Credit: Matt Lewis

Name: Corydoras aeneus
Size TankpHTemp
Origin: Amazon
7 cm 50 L 7.3 24C


Cories are easy to breed providing you have the right tank setup. I recommend a 40 L with a sponge filter. Put in 6 Cories. This way you have a 99% chance of getting males and females. Feed them well on sinking wafers, frozen bloodworms, shrimp pellets and they also love the Freeze Dried tablets Nutra Fin makes. Keep your pH at about 6.8, slightly soft, and a temp of about 25C and you should have spawnings. Provide lots of hiding places. Most Cories in LPS are quite young so it could take some time.

Cories love a slightly acidic pH, so rainwater will pull the pH down to where they like it. They also seem to like a BIG waterchange. About 50% at a time, this makes them think the rains have come. Pour it in slowly or use a watering can. Drop the temp about 2C, the big mama cory will get "in the mood" then *LOL*. Usually after you get your Cories going, expect spawnings 1 or 2 times per week of about 100-300 eggs. I have found C. aeneus to be the easiest cory to spawn, very prolific. Most of my C. aeneus spawn 2-3 times per week of about 250 eggs at a time.

How to deal with the fry: I remove the eggs, the adult Cories will try to eat their fry. And no use moving your prized breeders around all the time. Wait until the eggs are about 24-30 hours old before moveing them. They should be a golden brown color. Cut a straw in half and put your finger over one end and scrape the eggs off wherever they were deposited with the other end. Place them into a shallow white bowl under a lamp, add a drop of fungus guard to the water. The eggs should hatch in about 12 hours after this. When they do setup a small tank (10 or 20 liter) with water from the "breeder" tank, add an airstone and do DAILY water changes of 10%. Keep them at a temp of 26C. Feed powdered fry foods and BBS 5-6 times per day. When they seem crowded in there move them onto a 40 L, you can start adding some shrimp pellets to the diet now and add a sponge filter now too. Keep feeding them powdered fry foods and BBS too, keep doing the daily water changes. When they outgrow this tank you can move them to a 75 L, the long tanks work best for Cories, still use the sponge filter. You can probably now start cutting out the BBS and powdered foods. Start feeding them just as you are the adults. The daily water changes are needed. Oh I forgot something! Keep them on bare bottom tanks until they reach a size of about 2 cm, this way they wont get trapped under a gravel and die. Sand is a good idea for all Cories as it wont damage their "whiskers". Well I hope you enjoy your cats!

Contributed by Lynn Smith

We have Panda and Bronze Cories in a 284 Liter Community tank. We love to watch these playful little guys scurry the bottom looking for food. They lay on each others' heads. We have 4 of both kinds. They are a community fish like no other. Never once saw them fight even while eating on one shrimp pellet. Then at excercise time they shoot from the bottom to the top in nothing flat and back to the bottom. They may do this for 30 minutes straight. Haven't figured out why other than they're bored and need some action. The rest of the tank is filled mainly with white, black, and jewel Tetras so it's not from a lack of excitement in the tank. Guess they want to show the others that they do more than just scavage and eat!

Contributed by Bill Manganaro

I agree with Bill. The Bronze Cory I added to my 200 liter tank has certainly brought his special blend of excitement along. He doesn't take the other fish's flak and he almost always swims quickly from one side of the tank to the other, and also up and down. He seems to be a showoff of sorts. Overall, he gets along with everybody else, and seems to enjoy life.

Contributed by Crawley

I purchased three initially to see how they would fare, unfortunately my tetras decided they looked great eating and continually nipped at them until fungi became a major problem due to stress, I've lost two and the remainder is battling.

Contributed by James Murphy

In Crawley's case, I would guess he has only one Cory in his tank; otherwise, that little guy wouldn't "swim quickly from one side to the other". I once did the same thing by putting only ONE Cory into my 110 L tank. He kept doing what Crawley described above and ate nothing for two days. I was worried about him, so I went to the store to bring back a second one. Guess what? As soon as I put the new guy into the tank, the old one stopped swimming crazily: they just rested so quietly at the bottom of the tank, head to head. And after a little while, they started searching the bottom for food - peacefully and happily.

Contributed by Yonghui Ma

I recently started a community aquarium and bought two Bronze Catfish as I heard they were good starter fish. Two months later the two Catfish have bred and I now have 11. No regrets though as they are great fish.

Contributed by Wayne Hudson

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